/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.security.vote;

import java.util.Collection;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.vote.RoleVoter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;

/**
 * RoleVoter which requires all org.springframework.security.ConfigAttributes to be granted
 * authorities, given that the ConfigAttributes have the specified prefix ("ROLE_" by default). If
 * there are no supported ConfigAttributes it abstains from voting.
 *
 * @see org.springframework.security.access.vote.RoleVoter
 * @author Torgeir Lorange Ostby
 */
public class AllRequiredRoleVoter extends RoleVoter {
  @Override
  public int vote(
      Authentication authentication, Object object, Collection<ConfigAttribute> attributes) {
    int supported = 0;

    for (ConfigAttribute attribute : attributes) {
      if (this.supports(attribute)) {
        ++supported;
        boolean found = false;

        for (GrantedAuthority authority : authentication.getAuthorities()) {
          if (attribute.getAttribute().equals(authority.getAuthority())) {
            found = true;
            break;
          }
        }

        if (!found) {
          return ACCESS_DENIED;
        }
      }
    }

    if (supported > 0) {
      return ACCESS_GRANTED;
    }

    return ACCESS_ABSTAIN;
  }
}
